Blockchain Developer (Backend Focus)

Placements24; Southampton; Hybrid; GBP 41,000 - 59,000; Full time

Benefits offered by this job

Competitive salary

Hybrid work model

Opportunity to work with blockchain in

Professional development

Job summary

Placements24 is seeking a Blockchain Developer with a strong backend focus to join a dynamic startup in Randburg. You will build and scale backend infrastructure powering a blockchain data analytics platform, integrating with Ethereum, Bitcoin and other networks.

You will design scalable data models, develop APIs, and collaborate with frontend and data science teams to deliver robust solutions. A strong emphasis on security, performance, and clean code is expected.

Qualifications

• Bachelor's degree in Computer Science, Software Engineering, or a related field.
• 4+ years of backend development with at least 2 years in blockchain or distributed systems.
• Proficiency in Go, Python, Node.js, or Java and building RESTful APIs.

Responsibilities

• Develop, test, and maintain backend services and APIs for blockchain data processing and analytics.
• Design data models and storage solutions for large-scale blockchain datasets.
• Integrate with multiple blockchain nodes/APIs to ingest and process transactions.
• Optimize backend performance for speed, scalability, and reliability.
• Implement robust logging, monitoring, and error handling.

Skills

Backend development

Blockchain experience

Go

Python

Node.js

Java

REST APIs

Cloud platforms

Docker

Kubernetes

Kafka

RabbitMQ

AWS

GCP

Azure

Databases

Data warehousing

Education

Bachelor's degree in CS/Software Engineering or related

Tools

Docker

Kubernetes

PostgreSQL

MongoDB

Cassandra

AWS

GCP

Azure

REST clients

Kafka

RabbitMQ

Job description

About the Role

Our client, a dynamic startup innovating in the blockchain data analytics space, is seeking a skilled Blockchain Developer with a strong backend focus to join their team in **Randburg, Gauteng**. This role involves building and scaling the backend infrastructure that powers our data analytics platform, integrating with various blockchain networks, and developing robust APIs. You will work with cutting‑edge technologies to process, store, and analyze vast amounts of blockchain data, providing valuable insights to our users. The ideal candidate has a solid foundation in backend development, experience with distributed systems, and a keen interest in the intricacies of blockchain technology. Join us to contribute to a product that is transforming how businesses interact with blockchain data.

Key Responsibilities

• Develop, test, and maintain backend services and APIs for blockchain data processing and analytics.
• Design and implement efficient data models and storage solutions for large-scale blockchain datasets.
• Integrate with multiple blockchain nodes and APIs (e.g., Ethereum, Bitcoin, Polygon) to ingest and process transaction data.
• Optimize backend performance for speed, scalability, and reliability.
• Implement robust error handling, logging, and monitoring systems.
• Collaborate with frontend developers and data scientists to deliver seamless product experiences.
• Ensure the security and integrity of the backend systems and data.
• Research and evaluate new technologies and tools to improve the platform's capabilities.
• Write clean, well‑documented, and maintainable code.

Requirements

• Bachelor's degree in Computer Science, Software Engineering, or a related field.
• 4+ years of experience in backend development, with at least 2 years working with blockchain or distributed systems.
• Proficiency in one or more backend programming languages such as Go, Python, Node.js, or Java.
• Experience with database technologies (e.g., PostgreSQL, MongoDB, Cassandra) and data warehousing concepts.
• Understanding of blockchain protocols, transaction flows, and consensus mechanisms.
• Experience with building and consuming RESTful APIs.
• Familiarity with cloud platforms (AWS, GCP, Azure) and containerization (Docker, Kubernetes).
• Strong problem‑solving and analytical skills.
• Excellent communication and teamwork abilities.
• Experience with message queues (e.g., Kafka, RabbitMQ) is a plus.

Benefits

• Competitive salary and benefits package.
• Hybrid work model providing flexibility.
• Opportunity to work on challenging problems in blockchain data analytics in **Randburg**.
• Collaborative and innovative team environment.
• Professional development and training opportunities.
• Chance to work with a growing company in the exciting blockchain sector.
• Regular team social events.